toDo.txt

in M1 :
1 (Done) -  when running program, catch any exception and re-throw it as DB exception
        https://piazza.com/class/lel8rsvwc4e7j6/post/60

2 (Done) -  I think that the vector<row> in page should be initialized with max no.rows allowed in one page as input to its constructor, to increase performance
    https://piazza.com/class/lel8rsvwc4e7j6/post/45

3 (Done) - important : should write table info in metaData when creating table!

3 (Done)- throw exception in create table if the 3 hashTables don't have exactly the same keys
    https://piazza.com/class/lel8rsvwc4e7j6/post/125 

4 - important :  Meta data file should be used to learn about TYPES of columns, as well check if inserted value is between column min and max in a table with every insert/delete/update,for example, in insert, it only checks for existance of table name in listOfCreatedTables,but doesn't check columns and compare their types with input parameters !
             (Project grading schema)

5 (done I guess) - handle null values insertion/update/ delete 
      https://piazza.com/class/lel8rsvwc4e7j6/post/72   
      https://piazza.com/class/lel8rsvwc4e7j6/post/81 

6 (done) -  update method assumes that the clustering key is always integer, which is not neccessary
        https://piazza.com/class/lel8rsvwc4e7j6/post/58

7 (done) -  delete all pages if input hashTable is empty :
             https://piazza.com/class/lel8rsvwc4e7j6/post/35
             https://piazza.com/class/lel8rsvwc4e7j6/post/55

8 (done) - Duplicate value are not handeled correctly and both are added.

9 - I think we should binary search on rows when inserting value to find the location rather than using Collections.sort()
    (because the .contains() in the Page class insertAnEntry() checks linearly & WITH REFERENCE NOT COMPARING THE PK 
    ,thus outputting wrong results [in number 8] and allowing Dups).


in M2 :
1 - when creating an index on a column,throw exception if it contains null values
2 - when inserting a null value on a column that has an index built on, throw an exception